Heat dissipation structure, air conditioner electric cabinet and air conditioner system

Abstract

The invention discloses a heat dissipation structure, an air conditioner electric control box and an air conditioner system, and relates to the technical field of heat dissipation equipment, the heat dissipation structure comprises an outer heat exchange system, an inner heat exchange system, an inner heat exchange system and an outer heat exchange system, the inner heat exchange system is arranged in the electric control box and comprises an evaporator and a refrigerant pipeline which is communicated with the evaporator to form a circulation loop, and the evaporator is provided with cooling fins which are arranged in the electric control box; and the condensation assembly comprises a cooling pipeline communicating with the cooling pipeline and a refrigerant pipeline communicating with the refrigerant pipeline, the cooling pipeline is adjacent to the refrigerant pipeline, and the two heat exchange media flow in the cooling pipeline and the refrigerant pipeline correspondingly to complete heat exchange. The safe working temperature in the electric control box can be effectively controlled, and meanwhile, pollutants such as condensate water can be effectively prevented from being generated.

Description

Technical Field

[0001] The present application relates to the technical field of heat dissipation equipment, and in particular to a heat dissipation structure, an air-conditioning electric control box and an air-conditioning system. Background Art

[0002] The air conditioner electronic control box is usually connected to the mains or other high-voltage power supply. It contains a variety of electronic components, such as circuit breakers, contactors, relays, inverters, power supplies, etc., so its safety is of vital importance.

[0003] To ensure the safety of the electric control box, it is usually designed as a closed box to prevent dust, water and other debris from entering the box, thereby protecting the electronic components from damage.

[0004] In the process of implementing the present invention, the inventors found that the prior art has at least the following problems:

[0005] Since many components in the box will generate heat when working, the temperature inside the box will rise and exceed the allowable operating temperature range of the components, thus affecting the normal operation of the electric control box and even causing safety accidents.

[0006] Therefore, in view of the above technical problems, how to make the inside of the electric control box a safe working environment is a technical problem that technical personnel in this field need to solve. Summary of the invention

[0007] The purpose of the present application is to provide a heat dissipation structure, which can effectively control the electric control box to a safe operating temperature and effectively avoid the generation of pollutants such as condensed water.

[0008] To achieve the above objectives, the present application provides a heat dissipation structure, including:

[0009] The external heat exchange system is placed outside the electric control box and includes a cooling pipeline connected to the air conditioning cold source;

[0010] An internal heat exchange system is placed in the electric control box, comprising an evaporator and a refrigerant pipeline connected to the evaporator to form a circulation loop, and the evaporator is provided with a heat sink placed in the electric control box;

[0011] The condensing component includes a cooling pipe connected to the cooling pipeline and a refrigerant pipe connected to the refrigerant pipeline. The cooling pipe is adjacent to the refrigerant pipe. Two heat exchange media flow in the cooling pipe and the refrigerant pipe respectively to complete heat exchange.

[0012] Preferably, the cooling pipeline is provided with an automatic regulating valve to adjust the flow rate of the cooling pipeline entering the air-conditioning cold source.

[0013] Preferably, a control system is further included, wherein temperature sensors are provided inside and outside the electric control box, the control system is connected to the temperature sensor and the automatic regulating valve signal, and the control system adjusts the opening of the automatic regulating valve according to the temperature difference between the inside and outside of the control box to adjust the flow rate of the cooling pipeline into the air conditioning cold source, or,

[0014] The control system adjusts the opening of the automatic regulating valve within a preset temperature range inside the electric control box according to the temperature information monitored by the internal temperature sensor, so as to adjust the flow rate of the cooling pipeline entering the air conditioning cold source.

[0015] Preferably, the condensing component is a plate condenser, the condensing component is mounted on the electrical control box, the condensing component is connected to the evaporator, or the condensing component and the evaporator are integrally arranged to form an integrated heat dissipation module.

[0016] Preferably, the refrigerant pipeline is filled with refrigerant, the air-conditioning cold source is liquid cooling or air cooling, and the corresponding cooling pipe is filled with cold liquid or cold air.

[0017] Preferably, a cooling fan is provided in the electric control box at a position corresponding to the heat sink, so as to form a circulating air working environment in the electric control box.

[0018] Preferably, a capillary structure or a liquid wick is provided in the refrigerant pipeline to promote the circulation of the refrigerant in the refrigerant pipeline.

[0019] An air-conditioning electric control box comprises the heat dissipation structure described above.

[0020] An air conditioning system, comprising:

[0021] Refrigeration system;

[0022] The electric control system comprises the air-conditioning electric control box mentioned above.

[0023] Preferably, the cold source medium generated by the refrigeration system is injected into the condensing component of the air-conditioning electric control box through a cooling pipeline, so that the cold source medium exchanges heat with the refrigerant in the refrigerant pipeline in the condensing component.

[0024] Compared with the prior art, the technical solution provided by this application has at least the following beneficial effects:

[0025] The present application includes an external heat exchange system placed outside the electric control box and an internal heat exchange system located inside the electric control box. The external heat exchange system is connected to the cold source of the air conditioner. The internal heat exchange system uses an evaporator and a heat sink to cool the inside of the electric control box. While cooling the inside of the electric control box, the refrigerant in the internal heat exchange system absorbs heat. The heat-absorbing refrigerant will exchange heat with the external heat exchange system at the condensation component, thereby taking away the heat in the refrigerant. The refrigerant can circulate to dissipate heat inside the electric control box under the action of the refrigerant pipeline. At the same time, the external heat exchange system uses the cold source medium of the air conditioner to cool the refrigerant of the internal heat exchange system. By adjusting the flow rate of the cold source medium introduced into the cooling pipeline, the heat sink can be made to work roughly near the room temperature under the refrigeration action of the air conditioner, which can effectively avoid a large temperature difference between the temperature of the heat sink and the outside temperature, and thus can effectively avoid the generation of condensed water at the heat sink and other locations. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0027] FIG1 is a schematic diagram of a heat dissipation structure provided in an embodiment of the present application.

[0028] In the figure: 1- condensing component; 2- cooling pipeline; 3- external temperature sensor; 4- automatic regulating valve; 5- evaporator; 6- refrigerant pipeline; 7- cooling fan; 8- internal temperature sensor. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] It should be noted that in this embodiment, the directions or positional relationships indicated by "upper", "lower", "front", "back", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] In the related art, in order to solve the heat dissipation problem of the electric control box or electric control box, there are usually the following solutions:

[0033] In the electric control box or electric control box (the following only takes the electric control box as an example for explanation), fans are used to increase air convection inside, and the heat of the heating components is evenly dispersed to every corner of the electric control box, and the heat is dissipated by the surface of the electric control box. However, for electric control boxes with high-power heating components inside, relying on the heat dissipation of the electric control box itself cannot meet the needs.

[0034] Air conditioning refrigeration and heat dissipation has the advantage of good heat dissipation effect, but it may cause a temperature difference between the inside and outside of the electric control box, resulting in condensation water. Condensation water dripping onto components will affect the safety of the components. At the same time, the air conditioning refrigeration and heat dissipation solution is large in size and high in cost.

[0035] The direct ventilation structure dissipates heat, and the electric control box has heat dissipation holes. The fan brings the external cold air into the electric control box to dissipate the heat of the electric control box. This method is not suitable for outdoor working environments with severe pollution, high humidity, and rain. When used indoors, dust, water vapor and other pollutants in the environment will also bring risks to the normal operation of electrical components.

[0036] Based on the above scheme, the present application proposes a method that can effectively control the temperature of the electric control box and effectively ensure the safe use of the components inside the electric control box without the generation of pollution such as condensed water or dust. Specifically, please refer to Figure 1. This embodiment provides a heat dissipation structure, which includes an external heat exchange system, an internal heat exchange system and a condensation component 1. The external heat exchange system is located outside the electric control box and includes a cooling pipeline 2 connected to the air conditioning cold source; the internal heat exchange system is located inside the electric control box and includes an evaporator 5 and a refrigerant pipeline 6 connected to the evaporator 5 to form a circulation loop. At the same time, a heat sink placed in the electric control box is provided on the evaporator 5. The heat sink can increase the heat exchange area, thereby improving the heat exchange efficiency between the evaporator 5 and the environment inside the box.

[0037] The condensing component 1 includes a cooling pipe connected to the cooling pipe 2 and a refrigerant pipe connected to the refrigerant pipe 6. The inlet end and the outlet end of the cooling pipe are respectively connected to the cooling pipe 2, so that the cooling pipe 2 can inject the cold source medium into the cooling pipe and discharge it into the cooling pipe 2 after the heat exchange is completed to form a circulating external heat exchange channel.

[0038] The inlet and outlet ends of the refrigerant pipeline are respectively connected to the refrigerant pipeline 6, so that the refrigerant pipeline 6 can inject the refrigerant medium into the refrigerant pipeline and discharge it into the refrigerant pipeline 6 after completing the heat exchange, thereby forming a circulating internal heat exchange channel.

[0039] It should be noted that when the cold source medium and the refrigerant medium are respectively injected into the cooling pipe and the refrigerant pipe, the cold source medium and the refrigerant medium need to complete heat exchange in the condensation component 1; specifically, the cooling pipe can be arranged adjacent to the refrigerant pipe, so that the cold source medium can take away the heat from the refrigerant medium, thereby completing heat exchange through flow.

[0040] In some embodiments, the flow direction of the cold source medium in the cooling pipe is opposite to the flow direction of the refrigerant medium in the refrigerant pipe, thereby improving the heat exchange effect between the cold source medium and the refrigerant medium. Considering that there may be multiple cooling pipes and refrigerant pipes, it is sufficient to achieve the opposite flow direction of the internal media in the corresponding sections of the cooling pipe and the refrigerant pipe.

[0041] It should be pointed out that the cooling pipe and the refrigerant pipe can be a capillary structure, which can meet the transportation of the cold source medium and the refrigerant medium through multiple channels. At the same time, the capillary structure can reduce the cross-sectional area of ​​each condensation channel and improve the heat exchange efficiency between the cooling pipe and the refrigerant pipe.

[0042] When the temperature inside the electrical control box rises, the hot air can heat the heat sink, and the refrigerant inside the refrigerant pipe 6 can absorb heat and vaporize into steam; due to the pressure difference or the existence of the liquid absorption core, the steam will flow from the refrigerant pipe 6 to the refrigerant pipe of the condensation component 1; at the same time, the cold source medium in the cooling pipe can cool the refrigerant medium in the refrigerant pipe, so that the refrigerant condenses into liquid when it is cold in the condensation plate, and as the cold source medium in the cooling pipe continues to flow, the heat of the refrigerant medium can be quickly taken out and discharged from the electrical control box.

[0043] In summary of the above embodiments, the present application includes an external heat exchange system placed outside the electric control box and an internal heat exchange system located inside the electric control box. The external heat exchange system is connected to the cold source of the air conditioner. The internal heat exchange system uses the evaporator 5 and the heat sink to cool the inside of the electric control box. While cooling the inside of the electric control box, the refrigerant in the internal heat exchange system absorbs heat. The heat-absorbing refrigerant will exchange heat with the external heat exchange system at the condensation component 1, thereby taking away the heat in the refrigerant. The refrigerant can circulate under the action of the refrigerant pipeline 6 to dissipate heat inside the electric control box. At the same time, the external heat exchange system uses the cold source medium of the air conditioner to cool the refrigerant of the internal heat exchange system. By adjusting the flow rate of the cold source medium introduced into the cooling pipeline, the heat sink can be made to work roughly near the room temperature under the refrigeration action of the air conditioner, which can effectively avoid a large temperature difference between the temperature of the heat sink and the outside temperature, and thus can effectively avoid the generation of condensed water at the heat sink and other locations.

[0044] An automatic regulating valve 4 is provided on the cooling pipeline 2. The automatic regulating valve 4 may be an electric valve or a pneumatic valve or other valve with a controllable regulating function, so as to adjust the flow of the cold source medium entering the cooling pipeline 2 by adjusting the opening of the valve.

[0045] On this basis, this embodiment also proposes a control logic based on the temperature difference between the inside and outside of the box, that is, the heat dissipation mechanism of the present application also includes a control system. The control system can be a control unit built into the electrical control box, or a microcontroller separately arranged on the control box, etc. The internal and external temperature sensors 8 and 3 are respectively provided inside and outside the electrical control box. The internal temperature sensor 8 and the external temperature sensor 3 serve as feedback units and are also connected to the control system signal. At the same time, the control system is also connected to the automatic regulating valve 4 signal.

[0046] When the temperature inside the electric control box gradually rises and becomes higher than the temperature outside the box, the temperature difference between the inside and outside of the box is sensed by the control system, and the opening of the automatic regulating valve 4 is controlled according to the difference in temperature. That is, the greater the temperature difference, the greater the opening of the automatic regulating valve 4, thereby increasing the flow rate of the cold source medium in the cooling pipeline, thereby more efficiently achieving heat exchange between the cold source medium and the refrigerant medium, and improving the heat exchange effect between the refrigerant medium and the inside of the electric control box.

[0047] Considering that in some embodiments, the electrical control box can be used as the electrical control box of the air-conditioning system, and the refrigeration system in the air-conditioning system will cause the ambient temperature to drop, in order to avoid a large difference between the electrical control box and the ambient temperature, this embodiment uses the cold source of the air conditioner as the cold source medium of the cooling pipeline 2, and adjusts the flow rate of the cold source medium by adjusting the opening of the automatic regulating valve 4, thereby controlling the heat exchange rate between the cold source medium and the refrigerant medium, so that the heat sink in the electrical control box is at a temperature roughly the same as the room temperature, thereby effectively avoiding the generation of condensed water.

[0048] In addition, the control system can also monitor the internal temperature of the electric control box separately through the internal temperature sensor 8, and can make adaptive adjustments without comparing it with the external ambient temperature; that is, when the external ambient temperature is high, the temperature difference between the inside and outside of the box does not have a reference value. At this time, in order to ensure that the box is still at a safe working temperature, the internal temperature sensor 8 can be used to sense the temperature inside the box. For example, when the external ambient temperature of the box is low or high, it is only necessary to adjust the opening of the automatic regulating valve 4 within the preset temperature range to keep the temperature inside the box at a safe working temperature. Similarly, this method can also effectively prevent the temperature inside the box from being too low to prevent condensation water from appearing in the box.

[0049] In some embodiments, the condensation assembly 1 is a plate condenser, and the condensation assembly 1 is installed on the electric control box. For some boxes with high sealing requirements, the condensation assembly 1 can be installed on the outer wall of the box, or the condensation assembly 1 can be used as part of the wall of the box, that is, a mounting hole matching the condensation assembly 1 is opened on the box, and the condensation assembly 1 cooperates with the sealing component to achieve a sealed installation with the box. When the pipeline needs to pass through the inside and outside of the box, the sealing component is also required to seal the connection to ensure the sealing effect of the electric control box.

[0050] Furthermore, the cooling pipe and the refrigerant pipe can be channels or through holes opened on both sides of the plate condenser. The cooling pipe is located on the outer end surface of the plate condenser relative to the electrical control box, while the refrigerant pipe is located on the inner end surface of the plate condenser relative to the electrical control box. In this case, there is no need for the cooling pipe 2 and the refrigerant pipe 6 to pass through the inside and outside of the box.

[0051] It should be noted that the evaporator 5 of the present application can also be arranged on the condensing assembly 1, or be arranged integrally with the condensing assembly 1, so as to form an integral heat dissipation module, further reducing the volume of the heat dissipation structure, and facilitating installation on the electric control box and batch reuse. For the existing commonly used electric control boxes, the size is generally small, and the size of the heat dissipation structure can be greatly reduced by the above method.

[0052] In some embodiments, the refrigerant pipe 6 is filled with refrigerant, and the refrigerant circulates to achieve heat exchange with the internal environment of the electric control box. The air conditioning cold source can be liquid cooling or air cooling, and the corresponding cooling pipe is filled with cold liquid or cold air to achieve heat exchange with the refrigerant.

[0053] In addition, a cooling fan 7 is provided in the electric control box corresponding to the heat sink. On the one hand, the cooling fan 7 can improve the flow efficiency of hot air at the heat sink, thereby improving the heat exchange efficiency between the heat sink and the hot air; on the other hand, it can also form a working environment similar to direct ventilation inside the electric control box, thereby forming a circulating wind working environment inside the box, and combined with the good isothermal heat dissipation of the refrigerant pipeline 6, local low temperature will not occur inside the electric control box, avoiding condensation of water vapor.

[0054] A capillary structure or a liquid wick is provided in the refrigerant pipeline 6, which can be specifically arranged in the refrigerant pipeline 6 between the outlet end of the refrigerant pipeline and the evaporator 5, so that the refrigerant can flow back to the heat sink through the capillary structure or the liquid wick inside the refrigerant pipeline 6 to complete the circulation flow.

[0055] The present application also provides an air-conditioning electric control box, which includes the above-mentioned heat dissipation structure, so that the interior of the air-conditioning electric control box can also be kept at a safe working temperature through the heat dissipation structure, and at the same time can effectively avoid the generation of pollutants such as condensed water.

[0056] The present application also provides an air conditioning system, which includes a refrigeration system and an electric control system. The refrigeration system can refer to the existing related technologies and will not be described here, while the electric control system includes the above-mentioned air conditioning electric control box, and the electric control effect of the air conditioning system is achieved through the air conditioning electric control box. The cold source medium generated by the refrigeration system can be injected into the condensation component 1 of the air conditioning electric control box through the cooling pipeline 2, so that the cold source medium in the condensation component 1 exchanges heat with the refrigerant in the refrigerant pipeline 6 to ensure that the electric control system in the air conditioning system is in a safe working environment.

[0057] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0058] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A heat dissipation structure, characterized in that: include: The external heat exchange system is disposed outside the electric control box and includes a cooling pipeline (2) connected to a cold source of the air conditioner; An internal heat exchange system is placed in the electrical control box, comprising an evaporator (5) and a refrigerant pipeline (6) connected to the evaporator (5) to form a circulation loop, wherein the evaporator (5) is provided with a heat sink placed in the electrical control box; The condensing assembly (1) comprises a cooling pipe connected to the cooling pipeline (2) and a refrigerant pipe connected to the refrigerant pipeline (6), wherein the cooling pipe is adjacent to the refrigerant pipe, and two heat exchange media flow in the cooling pipe and the refrigerant pipe respectively to complete heat exchange.

2. The heat dissipation structure according to claim 1, characterized in that: The cooling pipeline (2) is provided with an automatic regulating valve (4) for regulating the flow rate of the cooling pipeline (2) entering the air conditioning cold source.

3. The heat dissipation structure according to claim 2, characterized in that: It also includes a control system, wherein temperature sensors are provided inside and outside the electric control box, the control system is connected to the temperature sensor and the automatic regulating valve (4) by signal, and the control system adjusts the opening of the automatic regulating valve (4) according to the temperature difference between the inside and outside of the control box to adjust the flow rate of the cooling pipeline entering the air conditioning cold source, or, The control system adjusts the opening of the automatic regulating valve (4) within a preset temperature range inside the electric control box according to temperature information monitored by the internal temperature sensor (8), so as to adjust the flow rate of the cooling pipeline entering the air conditioning cold source.

4. The heat dissipation structure according to claim 1, characterized in that: The condensing assembly (1) is a plate-type condenser. The condensing assembly (1) is mounted on the electrical control box. The condensing assembly (1) is connected to the evaporator (5), or the condensing assembly (1) and the evaporator (5) are integrally arranged to form an integrated heat dissipation module.

5. The heat dissipation structure according to claim 1, characterized in that: The refrigerant pipeline (6) is filled with refrigerant, the air conditioning cold source is liquid cooling or air cooling, and the corresponding cooling pipeline is filled with cold liquid or cold air.

6. The heat dissipation structure according to claim 1, characterized in that: A cooling fan (7) is provided in the electric control box at a position corresponding to the heat sink, so as to form a circulating air working environment in the electric control box.

7. The heat dissipation structure according to claim 1, characterized in that: The refrigerant pipeline (6) is provided with a capillary structure or a liquid wick to promote the circulation of the refrigerant in the refrigerant pipeline (6).

8. An air conditioner electric control box, characterized in that: The heat dissipation structure comprises the heat dissipation structure according to any one of claims 1 to 7.

9. An air conditioning system, characterized in that: include: Refrigeration system; The electric control system comprises the air-conditioning electric control box as claimed in claim 8.

10. The air conditioning system according to claim 9, characterized in that: The cold source medium generated by the refrigeration system is injected into the condensing component (1) of the air-conditioning electric control box through the cooling pipeline (2), so that the cold source medium in the condensing component (1) exchanges heat with the refrigerant in the refrigerant pipeline (6).

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